Convert Fluid Drams to Imperial Gallons
Convert Fluid Drams (fl dr) to Imperial Gallons (UK gal) instantly and accurately.
Conversion Formula
UK gal = fl dr × 0.0008131583834
About Fluid Drams
A fluid dram (fl dr, also 'drachm') = 1/8 fl oz ≈ 3.697 mL. Used by apothecaries for precise medicinal compounding; a fluid dram divided into 60 minims. Largely superseded by millilitres but still appears in traditional compounding recipes, older US pharmacopeias, and historical medical literature. 1 fl dr ≈ 3.697 mL.
About Imperial Gallons
A US imperial gallon (UK gal) = exactly 8 imperial pints or 10 lb of pure water at 62°F ≈ 4.546 L - about 20% larger than the US liquid gallon (3.785 L). The weight-based definition made it verifiable with simple scales. Still the legal fuel measure in the Cayman Islands and other British Overseas Territories. UK mpg ratings use imperial gallons: 50 UK mpg ≈ 42 US mpg. 1 UK gal ≈ 4.546 L.
Quick Reference Table
| Fluid Drams (fl dr) | Imperial Gallons (UK gal) |
|---|---|
| 1 fl dr | 0.000813158 UK gal |
| 2 fl dr | 0.00162632 UK gal |
| 5 fl dr | 0.00406579 UK gal |
| 10 fl dr | 0.00813158 UK gal |
| 25 fl dr | 0.020329 UK gal |
| 50 fl dr | 0.0406579 UK gal |
| 100 fl dr | 0.0813158 UK gal |